NDLI: Bi-2223 Field-Poles Without Iron Core for an Axial Type of HTS Propulsion Motor

Content Provider	IEEE Xplore Digital Library
Author	Sugyo, D. Kimura, Y. Sano, T. Yamaguchi, K. Tsuzuki, K. Taguchi, R. Izumi, M. Miki, M. Kitano, M. Sugimoto, H. Fujimoto, H.
Copyright Year	2002
Abstract	We have conducted both electrical and cryomechanical designs of a superconducting propulsion motor based on field-poles made of twinned double-pancake-coils (DPC) with Bi-2223 superconducting wire. Neither field-poles nor armature coils have an iron core; that way the magnetic flux increases with increasing applied current in the HTS wire. Special attention has been paid to reducing heat from the coils upon excitation. We have fixed a final design with a low energy loss up to 0.25 W maximum excitation of 1.5 T, corresponding to a current of 200 A at 30 K. In the present study, we have assembled these 8 twinned DPCs into the HTS axial-gap type motor. The dimensions of the motor are 850 mm in diameter for 507 mm in length and the weight is 1044 kg for 100 kW at 230 rpm. The HTS field-pole coils were cooled by thermal conduction by using a circulation of condensed neon with a thermal siphon using a GM cryocooler. We report cryomechanical and technical issues. The successful excitation of the HTS rotor made of 8 twinned DPCs and the rotation test under low frequency are described.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1687
Ending Page	1691
Page Count	5
File Size	399210
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iron High temperature superconductors Propulsion Superconducting coils Magnetic cores Superconducting filaments and wires Thermal conductivity Magnetic flux Energy loss Assembly winding Axial-type Bi-2223 high-${\rm T}_{\rm c}$ superconductor HTS coil HTS motor synchronous motor
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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